Hi,
I'm new there and pretty new to the robotic world and i'm trying to do a project with a L293N to drive my motors from an Arduino board.
Let me explain the problem....
I have tried 2 motors
First one is a small 5v ( i suppose) motor comming from an old CD-ROM drive.
The Second one is a unknown 12v motor.
The problem is:
The small motor when connected to L293 is running about at half speed then when connected directly to the Power Supply. I didnt calculate the amps but it should be really low.
The bigger 12v motor is not running at all when connected to the L293. When connected directly to the power supply it run fine and i'm observing a peak of about 1.2Amps at startup then it runs at about 600mA. When Applying PWM to the input pin I can ear noise. It start to run when I connect 1 of the 2 wires of the motor to the ground it running fine and at full speed.
The Facts:
The Schematic I'm using is the one comming with the specsheet of the L293N IC for Bi-Directional. I tried with and without the diodes I used (251D) but I think the diodes are just a higher level of short circuit protection.
I also tried of stacking 2 L293N chip and using all the 8 bridges on it ... with the sames results.
the +5V for IC logic is connected to my arduino 5V supply
I tried with a 1000uF Capacitor on the 12V line too without any succes.
I also tried to connect 1 input pin to groun and the other to +5V with the same problem.
I'm kinda out of idea i'm working on this for about 7hours and browsing the web without any clue of what happening....
I'm aware I may have not included all the detail you need to help me but will be pleased to provide them for you to help me.
thanks.
I'm new there and pretty new to the robotic world and i'm trying to do a project with a L293N to drive my motors from an Arduino board.
Let me explain the problem....
I have tried 2 motors
First one is a small 5v ( i suppose) motor comming from an old CD-ROM drive.
The Second one is a unknown 12v motor.
The problem is:
The small motor when connected to L293 is running about at half speed then when connected directly to the Power Supply. I didnt calculate the amps but it should be really low.
The bigger 12v motor is not running at all when connected to the L293. When connected directly to the power supply it run fine and i'm observing a peak of about 1.2Amps at startup then it runs at about 600mA. When Applying PWM to the input pin I can ear noise. It start to run when I connect 1 of the 2 wires of the motor to the ground it running fine and at full speed.
The Facts:
The Schematic I'm using is the one comming with the specsheet of the L293N IC for Bi-Directional. I tried with and without the diodes I used (251D) but I think the diodes are just a higher level of short circuit protection.
I also tried of stacking 2 L293N chip and using all the 8 bridges on it ... with the sames results.
the +5V for IC logic is connected to my arduino 5V supply
I tried with a 1000uF Capacitor on the 12V line too without any succes.
I also tried to connect 1 input pin to groun and the other to +5V with the same problem.
I'm kinda out of idea i'm working on this for about 7hours and browsing the web without any clue of what happening....
I'm aware I may have not included all the detail you need to help me but will be pleased to provide them for you to help me.
thanks.
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